#include <stdlib.h>
#include <stdio.h>

int main()
{
	int a=10,b=100;
	int * p1=&a;
	int * p2=&b;
	int * tmp = p1;
	*tmp=20;
	int tmp2 = *p1;
	tmp2 = 30;
	printf("p1==%d\t a==%d \t tmp2=%d\n",*p1,a,tmp2);
	exit(0);
}
